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Variable friction-type spherical surface-cylindrical surface friction-type support

A technology of variable friction and cylindrical surface, applied in the direction of bridge parts, building components, bridges, etc., can solve the problems of structural resonance, increase structural seismic response, etc., achieve the effect of simple structure, prolong service life, and protect from damage

Active Publication Date: 2015-09-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention solves the problem that the rigidity and damping of the existing friction pendulum bearing are constant, resulting in resonance of the structure and increasing the seismic response of the structure, and further provides a variable friction spherical-cylindrical friction bearing

Method used

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  • Variable friction-type spherical surface-cylindrical surface friction-type support
  • Variable friction-type spherical surface-cylindrical surface friction-type support
  • Variable friction-type spherical surface-cylindrical surface friction-type support

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specific Embodiment approach 1

[0019] Specific implementation mode one: as Figure 1-8 As shown, the variable friction spherical-cylindrical friction bearing of this embodiment includes a cover plate 4, a slider 5, a chute 6 and a connecting steel plate 7, the chute 6 is installed on the upper end surface of the connecting steel plate 7, and the sliding block 5 is located in the chute 6, the upper half of the slider 5 is hemispherical, and the center of the lower end of the cover plate 4 is processed with a hemispherical groove matching the slider 5, and the cover plate 4 is supported on the chute 6 by the slider 5 On the upper end face of the chute, the outline of the left half of the chute 6 is rectangular, the outline of the right half of the chute is semicircular, the left half of the chute 6 is processed with a cylindrical groove 9, and the right half of the chute 6 Spherical groove 8 is processed on the inside, and the arc surface radius of cylindrical groove 9 is set the same as the arc surface radiu...

specific Embodiment approach 2

[0031] Specific implementation mode two: as Figure 2-8 As shown, the radius of curvature of the bottom surface of the slider 5 in this embodiment is consistent with the radius of curvature of the chute 6 . Such a design can make effective contact between the slider 5 and the chute 6, increase the effective friction of the friction pendulum support, improve the sliding energy dissipation capacity, and reduce the stress concentration of the chute 6, reduce collisions, reduce wear, and extend Support life. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0032] Specific implementation mode three: as Figure 2-8 As shown, the spherical radius of the upper hemisphere of the slider 5 in this embodiment is consistent with the radius of the hemispherical groove on the cover plate 4 . Such a design can make effective contact between the slider 5 and the hemispherical groove on the cover plate 4, increase the effective friction of the friction pendulum support, improve the sliding energy dissipation capacity, and reduce the friction of the hemispherical groove on the cover plate 4. Stress concentration reduces collision, reduces wear and prolongs the service life of the support. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

A variable friction-type spherical surface-cylindrical surface friction-type support relates to a friction-type support, which is designed to solve the problems that resonance is produced by a structure and that structural seismic response is increased due to rigidity and constant damping of the existing friction pendulum support, wherein a slide groove is mounted on an upper end face of a connection steel plate; a slide block is located inside the slide groove; an upper portion of the slide block is a hemisphere shape; a hemisphere recess cooperated with the slide block is processed in the middle position of a lower end of an end cover; the end cover is supported on an upper end face of the slide groove through the slide block; an outline of the left half portion of the slide groove is shaped as a rectangle and the outline of the right half portion of the slide groove is shaped as a semicircle; a cylindrical groove is processed on the left half portion of the slide groove; a spherical recess is processed on the right half portion of the slide groove; a cambered surface radius of the cylindrical recess is set in a same way with the cambered surface radius of the spherical recess; the cylindrical recess and the spherical recess are connected in a smooth transitional way to form a complete slide surface; the upper end face of the slide groove is divided with at least two concentric circles in order from the center to the outside; and the friction coefficient at the concentric circle position from inside to outside is sequentially increased. The variable friction-type spherical surface-cylindrical surface friction-type support is used for vibration insulation for a large-span space structure.

Description

technical field [0001] The invention relates to a friction bearing, in particular to a variable friction spherical-cylindrical friction bearing used for vibration isolation and shock absorption of building structures. Background technique [0002] At present, the shock-absorbing and shock-isolation bearings used on large-span structures such as bridges and space grids mainly include lead rubber bearings, high-damping rubber bearings, and sliding friction bearings. These bearings have high damping and low stiffness. , large deformation, corrosion resistance and other advantages. In 1985, Zayas, a scholar at the University of California, USA, proposed an efficient and completely passive dry friction slip isolation device, the Friction Pendulum Bearing (FPB). This kind of bearing has many characteristics of plane sliding seismic isolation bearing, such as low sensitivity and high stability to seismic excitation, and the friction pendulum bearing can use its unique spherical sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/36E04B1/98E01D19/04
Inventor 范峰孔德文支旭东孙梦涵
Owner HARBIN INST OF TECH
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